<DOCTYPE HTML>
    <html>
    <head>
        <title></title>
        <meta charset="utf-8">
        <style type="text/css">
            .total{border:1px solid red; width:800px; height:600px; margin:30px auto;}
            .contain{border:1px solid black; width:600px; height: 400px; margin:100px auto;}
        </style>
    </head>
    <body>
    <div class="total">
        <div class="contain">
        </div>
    </div>
    </body>
    </html>